/* -*- coding: utf-8 -*-
 *
 * 338.cc: No.338 アンケート機能 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_A = 200;
const int MAX_B = 200;

const int INF = 1 << 30;

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int la, lb;
  cin >> la >> lb;

  int minab = INF;
  
  for (int a = 0; a <= MAX_A; a++)
    for (int b = 0; b <= MAX_B; b++) {
      int ab = a + b;
      if (ab == 0) continue;

      if ((200 * a + ab) / (2 * ab) == la &&
	  (200 * b + ab) / (2 * ab) == lb &&
	  minab > ab) minab = ab;
    }

  printf("%d\n", minab);
  return 0;
}